Yielding slider



July 23, R957 R DELLAQUILA 2,799,9U9

YIELDING SLIDEIR Filed Jan. 10, 1952 I; 12ml w i a BY flt z TTOR EY' United States Patent YIELDING SLIDER Robert Dellaquila, New York, N. Y.

Application January 10, 1952, Serial No. 265,786

2 Claims. (Cl. 24--205.15)

This invention relates to sliders for slide fasteners and has for its object to provide an improved device of this type which will override small obstructions and which will therefore not jam when threads or cloth are caught between the slides and adjacent slide fastener elements.

It often happens that unfinished or curled edges other than extrinsic parts of a garment, such as a ladys dress, get caught between a slider and the series of slide fastener elements, known as the chain. The extrinsic material may become wedged in the slider to the point where it is very difficult or even impossible for the wearer to remove. The need for a slider which will overcome these drawbacks has brought about suggestions of numerous different designs, but, so far as I am aware, all such designs are based on the premise that jamming can be cured only be removing and replacing the slider on the chain. The resultant constructions all require special instructions to a user, at least a small amount of mechanical ability by the user, and a risk that the slider will become lost during cleaning. Furthermore such constructions are generally very much more expensive to manufacture and, in any case, have not met with commercial success'even though many of them have been known to slide fastener manufacturers for a period of years.

The object of this invention is to provide a slide which will expand automatically when overrunning extrinsic material, which need never be removed from operating associations with its chain, which requires no mechanical knowledge for its operation but may be operated in the same manner as a conventional one piece slider insofar as the user is concerned.

More particularly it is the object of this invention to provide a slider composed of two parts held together by a spring, the spring imparting a resilience which permits the two parts to separate sufiiciently to override extrinsic material and thereafter, automatically, to resume its normal position with respect to its chain. As will be hereinafter more fully described the spring is preferably made of a stiff piece of piano wire and at least partially imbedded in the slider halves so that, in appearance, it will closely resemble a one piece slider. By the simple construction a further object of the invention is accomplished which is to provide a multipart slider capable of being manufactured very economically, and adaptable for rapid, economical assembly.

Other objects and advantages will become hereinafter more fully apparent as reference is had to the accompanying drawings wherein my invention is illustrated, by way of example, and in which:

Fig. 1 is a top plan view of my improved slider,

Fig. 2 is a side elevation of the slider of Fig. 1,

Fig. 3 is a vertical section of the slider taken substantially along the line 33 of Fig. 2,

Fig. 4 is a bottom view of the upper plate taken along the line 4-4 of Fig. 2,

Fig. 5 is a top elevation of my improved slider showing a modified construction, and

Fig. 6 is a side elevation of the slider shown in Fig. 5.

More particularly, the numeral 1 indicates the slider, generally, which is conventionally made in one die cast piece but which is here shown as being composed of two parts 2 and 3. The upper part 2 may be considered as a plate having depending skirts 4 which receive a slide fastener chain and guide the plate 2 thereon. The end of the plate 2 from which the skirts 4 depend is usually considered the front end thereof. Atop the plate 2 a pull-tab 5 is hingedly secured in any convenient manner.

The lower plate 3 is of identical contour with the upper plate 2 and has corresponding skirts 6 arising from spaced edges thereof which together with the skirts 4 complete the retaining track to receive the fastener chain (not shown).

The rear ends of the two plates 2 and 3 are conventionally connected by an integral juncture section known as the post. According to my invention, the post is divided into two parts, the upper plate 2 having the half post 7 integral therewith and the lower plate 3 having .the half post 8 integral therewith. The meeting surfaces of the post halves are flat at their front halves 7a andBa to give surface contact with each other while their rear halves 7b and 8b are also fiat but angularly disposed toward each other to permit opening movement of the front edges of the plates 2 and 3 limited by the abutment of the plain rear surfaces 7b and 8b of the posts 7 and 8. In order to prevent dislocation of the members 2 and 3 laterally or longitudinally with respect to each other I provide a lateral rocker 9 on one post half 7 and a receiving trough 10 in the other post half 8, and I also provide a longitudinal aligning member 11 integral with one post half 7 and a receiving trough 12 in the other post half 8. The rocker 9 and aligning member 11 are best seen in Fig. 4. The aligning member 11 and rocker 9 constitute a substantially cruciform figure. The aligning member 11 on post 7 fits into the trough 12 on post 8. Aligning member 11 extends on both sides of rocker 9 and is coextensive with the face 712 of post 7 while trough 12 is coextensive with face 8b. and receives the aligning member 11 when the plates 2 and 3 move to move to divergent positions with the rear halves 7b and 8b of the posts 7 and 8 in abutting contact. The aligning member 11 conforms with the longitudinal contour of post 7 while trough 12 conforms with the longitudinal contour of post 8. The aligning member 11 extends both forwardly and rearwardly with respect to the rocker 9 and the rocker 9 fits into the transverse trough 10 allowing the aligning member 11, forwardly of rocker 9, to fit in trough l2 forwardly of rocker 9, while the rearwardly extending portion of aligning member 11 is elevated out of the rearwardly extending portion of trough 12 when faces 7a and 8a are in abutment. When the plates 2 and 3 are divergent the rearwardly extending portion of aligning member 11 fits into the rearwardly extending portion of trough 12 with the divergent faces 71) and 8b in abutment.

In order to retain the two post halves in firm assembly I provide a spring 13 of U-shape which lies in grooves 14 provided for its reception. The grooves 14 are each deeper at the outer ends of the spring 13 so that the ends are flush or almost flush with the adjacent surfaces of the plate members 2 and 3. The spring 13 is, preferably, round and of piano wire quality. It extends along a portion of the outer surfaces of the members 2 and 3 and is partially embedded in the exterior surfaces of the post halves 7 and 8.

Since the wire or spring 13 is quite stiff the slider 1 is operative to open and close slide fastener in the usual manner but if extrinsic material finds its way between the slider plates and the chain above normal pulling pressure on the slider tab 5 will cause the front edges of Patented July 23, 1951 the plates 2 and 3 to pivot on the rocker 9 in an opencome necessary in that case.

The form of my invention illustrated in Figs; and '6 is exactly the same as previously described with the exception that a flat spring is used in place of the round spring 13, the receiving grooves 16 therefor being made of a size to exactly receive the flat springs; As previously described in connection with the spring 13 the ends 17 of thespring 15 find. a deeper groove so that they will be substantially flush with the adjacent surfaces of the plates 2a and 3a. r

The operation is the same as has been described in connection with Figs. 1 to 1 a 'The invention is susceptible of various modifications and'l therefore desire tobe extended protection as defined bythescope of the appended claims.

What I claim is: Y

1. A two part'slider for slide fasteners comprising a pair of coacting plates, a post projecting from each of said plates adjacent the rear edges thereof and directed 7 toward each other, the front adjacent surfaces of said posts normally extending in abutting contact and the rear adjacent faces of said posts diverging from each other whereby saidplates may be rocked to divergent positions, one of said posts having a transverse rocker and a longitudinally extendingaligning member integrally formed thereon in intersecting relation and the other of said posts having grooves of corresponding contour formed therein to receive said rocker and said aligning member, said aligning member extending parallel with the longitudinal axes of said plates and serving as means to prevent transverse rotational movement and relative lateral displacement of said plates and said rocker extending normal to the aforesaid member and having a rounded surface serving in combination with the groove within which said rocker fits as means about which said plates may rock with respect to each other into divergent positions, and a spring partially enveloping the exterior of the rear ends of each of said posts, and partially embedded in the opposite exterior faces of the rear portion of said plates, said spring yieldingly resisting relative rocking movement of said plates and constituting the sole means for holding said plates in assembled relation, said spring permitting and yieldingly resisting relative bodily movements of said plates 'awayfrom each other immediately in response to an abnormal force and automatically restoring said plates to position fully ready for normal sliding operation upon cessation of said force.

2. A two part slider for slide fasteners as set forth in claim 1 in which said posts have flat faces extending forwardly of said rocker and normally abutting each other and wherein the faces of said posts commencing at said rocker and extending to the-rear of said plates extend in flat divergent planes movable into abutting contact when said forwardly disposed faces are moved to divergent positions. I a 7 References Cited in the file of this patent UNITED STATES PATENTS 1,357,233 Hagelstein Nov. 2, 1920 1,679,196 Zieburtz July 31, 1928 1,684,721 Wood Sept.'1 8, 1928 2,082,988 Taskila June 8, 1937 2,131,625 Mucci NOV. 28, 1939 2,261,005 Thompson Oct. 28, 1941 r 2,405,509 Marinsky Aug. 6, 1946 2,461,333 Maccaferri Feb. 8, 1949 2,496,664 Haidegger Feb. 7, 1950 2,608,734 Beckerman Septl 2, 1952 2,626,440 Carlile Jan; 27, 1953 FOREIGN PATENTS I 638,646 Germany of 1935 France of 1944 

